20090920

素因数分解:

$2^3\times 5^1\times {\mathrm{101}}^1\times {\mathrm{4973}}^1$

素因数の和:5085

約数の個数: 32

約数和(自身を含む): 45661320

約数和(自身を除く): 25570400

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 101, 202, 404, 505, 808, 1010, 2020, 4040, 4973, 9946, 19892, 24865, 39784, 49730, 99460, 198920, 502273, 1004546, 2009092, 2511365, 4018184, 5022730, 10045460, 20090920]

約数ペア:

[(1, 20090920), (2, 10045460), (4, 5022730), (5, 4018184), (8, 2511365), (10, 2009092), (20, 1004546), (40, 502273), (101, 198920), (202, 99460), (404, 49730), (505, 39784), (808, 24865), (1010, 19892), (2020, 9946), (4040, 4973)]